1. Department of Administration, Cangzhou Central Hospital, Cangzhou, Hebei 061000, P.R. China
2. Department of Radiology, Cangzhou Central Hospital, Cangzhou, Hebei 061000, P.R. China
3. Department of Scientific Research, Cangzhou Central Hospital, Cangzhou, Hebei 061000, P.R. China
4. Department of Human Resources, Cangzhou Central Hospital, Cangzhou, Hebei 061000, P.R. China